Helicopter roll control effectiveness criteria program summary

A study of helicopter roll control effectiveness is summarized for the purpose of defining military helicopter handling qualities requirements. The study is based on an analysis of pilot-in-the-loop task performance of several basic maneuvers. This is extended by a series of piloted simulations using the NASA Ames Vertical Motion Simulator and selected flight data. The main results cover roll control power and short-term response characteristics. In general the handling qualities requirements recommended are set in conjunction with desired levels of flight task and maneuver response which can be directly observed in actual flight. An important aspect of this, however, is that vehicle handling qualities need to be set with regard to some quantitative aspect of mission performance. Specific examples of how this can be accomplished include a lateral unmask/remask maneuver in the presence of a threat and an air tracking maneuver which recognizes the kill probability enhancement connected with decreasing the range to the target. Conclusions and recommendations address not only the handling qualities recommendations, but also the general use of flight simulators and the dependence of mission performance on handling qualities

Battery Management System for a Formula SAE car concept

openIn this thesis, a Battery Management System prototype has been developed for a formula SAE concept car. The design is focused on trying to improve the reliability of the system and remove problems that the previous version had. To do this, numerous tests were carried out on the previous version and critical points were analyzed in order to solve them. The purpose of this report is to explain the entire development phase and how the prototype came about. The choices of the components that make up the prototype will be analyzed and the programming code written to be able to control the microcontroller and allow the correct exchange of data between the various integrated components in the prototype will be presented. However, with this elaborate we do not want to propose a finished design of the entire battery monitoring system, but a good starting point for the development of the structure.In this thesis, a Battery Management System prototype has been developed for a formula SAE concept car. The design is focused on trying to improve the reliability of the system and remove problems that the previous version had. To do this, numerous tests were carried out on the previous version and critical points were analyzed in order to solve them. The purpose of this report is to explain the entire development phase and how the prototype came about. The choices of the components that make up the prototype will be analyzed and the programming code written to be able to control the microcontroller and allow the correct exchange of data between the various integrated components in the prototype will be presented. However, with this elaborate we do not want to propose a finished design of the entire battery monitoring system, but a good starting point for the development of the structure

2009 Formula SAE Race Car

Design and fabrication of the 2009 Formula Society of Automotive Engineers (SAE) race car focuses on developing a simple, lightweight and easily operated vehicle. Compliance with SAE rules is compulsory and governs a significant portion of the objectives. Aspects of ergonomics, safety, ease of manufacture, and reliability are incorporated into the design specifications. Analyses are conducted on all major components to optimize strength and rigidity, improve vehicle performance, and to reduce complexity and manufacturing costs

Fracture, Fatigue, and Structural Integrity of Metallic Materials and Components Undergoing Random or Variable Amplitude Loadings

Most metallic components and structures are subjected, in service, to random or variable amplitude loadings. There are many examples: vehicles subjected to loadings and vibrations caused by road irregularity and engine, structures exposed to wind, off-shore platforms undergoing wave-loadings, and so on. Just like constant amplitude loadings, random and variable amplitude loadings can make fatigue cracks initiate and propagate, even up to catastrophic failures. Engineers faced with the problem of estimating the structural integrity and the fatigue strength of metallic structures, or their propensity to fracture, usually make use of theoretical, numerical, or experimental approaches. This reprint collects a series of recent scientific contributions aimed at providing an up-to-date overview of approaches and case studies—theoretical, numerical or experimental—on several topics in the field of fracture, fatigue strength, and the structural integrity of metallic components subjected to random or variable amplitude loadings

Muscle activation patterns in shoulder impingement patients

Introduction: Shoulder impingement is one of the most common presentations of shoulder joint problems 1. It appears to be caused by a reduction in the sub-acromial space as the humerus abducts between 60o -120o – the 'painful arc'. Structures between the humeral head and the acromion are thus pinched causing pain and further pathology 2. Shoulder muscle activity can influence this joint space but it is unclear whether this is a cause or effect in impingement patients. This study aimed to observe muscle activation patterns in normal and impingement shoulder patients and determine if there were any significant differences. Method: 19 adult subjects were asked to perform shoulder abduction in their symptomatic arm and non-symptomatic. 10 of these subjects (age 47.9 ± 11.2) were screened for shoulder impingement, and 9 subjects (age 38.9 ± 14.3) had no history of shoulder pathology. Surface EMG was used to collect data for 6 shoulder muscles (Upper, middle and lower trapezius, serratus anterior, infraspinatus, middle deltoids) which was then filtered and fully rectified. Subjects performed 3 smooth unilateral abduction movements at a cadence of 16 beats of a metronome set at 60bpm, and the mean of their results was recorded. T-tests were used to indicate any statistical significance in the data sets. Significance was set at P<0.05. Results: There was a significant difference in muscle activation with serratus anterior in particular showing a very low level of activation throughout the range when compared to normal shoulder activation patterns (<30%). Middle deltoid recruitment was significantly reduced between 60-90o in the impingement group (30:58%).Trends were noted in other muscles with upper trapezius and infraspinatus activating more rapidly and erratically (63:25%; 60:27% respectively), and lower trapezius with less recruitment (13:30%) in the patient group, although these did not quite reach significance. Conclusion: There appears to be some interesting alterations in muscle recruitment patterns in impingement shoulder patients when compared against their own unaffected shoulders and the control group. In particular changes in scapula control (serratus anterior and trapezius) and lateral rotation (infraspinatus), which have direct influence on the sub-acromial space, should be noted. It is still not clear whether these alterations are causative or reactionary, but this finding gives a clear indication to the importance of addressing muscle reeducation as part of a rehabilitation programme in shoulder impingement patients

BUSINESS LOGIC PLAN PENGEMBANGAN PRODUKSI FORMULA GARUDA 16 DALAM AJANG KOMPETISI STUDENT FORMULA JAPAN TAHUN 2016

Penelitian ini bertujuan untuk mengetahui proses penyusunan Business Logic Plan dan hasil dari Business Logic Plan yang meliputi ringkasan eksekutif dan presentasi bisnis dengan acuan regulasi Formula SAE 2016. Penelitian ini merupakan penelitian deskriptif kualitatif yang menggunakan metode observasi dalam pengumpulan data untuk memecahkan permasalahan. Jenis penelitian yang digunakan dalam penelitian ini adalah jenis penelitian deskriptif murni atau survei. Subyek yang diteliti pada penelitian ini adalah penyusunan Business Logic Plan pengembangan produksi Formula Garuda 16 dalam ajang kompetisi Student Formula Japan. Teknik analisis data menggunakan analisis deskriptif dengan menggunakan tiga langkah, yaitu reduksi data, penyajian data, dan verifikasi data dan penarikan kesimpulan. Hasil penelitian ini menunjukan bahwa pada proses penyusunan Business Logic Plan (BLP) dilakukan dalam beberapa tahap, yaitu analisis pasar, analisis daya beli konsumen, analisis penghasilan konsumen, analisis volume pasar, dan analisis persaingan. Setelah melakukan analisis tersebut kemudian menyusun strategi perusahaan yang berisi strategi pemasaran, strategi keuangan, strategi kendaraan, strategi bahan baku dan strategi manufaktur. Setelah dilakukan perhitungan, investor dapat berinvestasi sebesar $ 1.000.000 untuk perusahaan Garuda UNY Racing Team, investor akan mendapatkan payback period dalam waktu 2 tahun dan ownership sebesar 35 % dengan nilai ROI (Return of Investment) 51 % sedangkan BEP (Break Even Point) akan dicapai dalam waktu 2 tahun. Setelah dipresentasikan dalam kegiatan Student Formula Japan 2016, Garuda UNY Racing Team mendapatkan skor 48,75 poin sehingga mendapatkan posisi 18 dari total 92 tim yang telah lolos seleksi dokumen dari 106 World FSAE Team yang terdaftar

Análisis y optimitzación de la estructura y comportamiento de un chasis

Este proyecto analiza cómo afecta la adaptación de un nuevo motor distinto al original en un chasis de un kart. Después de analizarlo y ver que el kart no puede soportar y funcionar con el motor en cuestión, este proyecto se centrará en optimizar el rendimiento del kart en las diferentes situaciones de forma que pueda soportar los mayores esfuerzos posibles